After nervously watching online all day (the butts seemed to heat up very quickly at first) I got home and saw I was stuck in plateau land at ~175. Not wanting to be up all night I pushed the grill grate temperature up to 300.
I wound up with this
which when introduced to the sauce (I think Ill make more sauce - I dont think I had enough)
produced this -
The pork tasted good while being pulled. I guess due to the sugar in the rub the skin took a very crisp crackling like quality. It was however a bit on the sweet side. I'm looking forward to trying the meat reheated in sandwiches, perhaps with a bit more sauce.